EP3380731A1 - Pompe à fluide à membrane - Google Patents

Pompe à fluide à membrane

Info

Publication number
EP3380731A1
EP3380731A1 EP16855854.2A EP16855854A EP3380731A1 EP 3380731 A1 EP3380731 A1 EP 3380731A1 EP 16855854 A EP16855854 A EP 16855854A EP 3380731 A1 EP3380731 A1 EP 3380731A1
Authority
EP
European Patent Office
Prior art keywords
membrane
fluid pump
connecting rods
eccentrics
membrane fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP16855854.2A
Other languages
German (de)
English (en)
Other versions
EP3380731A4 (fr
Inventor
Daniel OTTOSEN
Gunnar Skarping
Marianne Dalene
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Provtagaren AB
Original Assignee
Provtagaren AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Provtagaren AB filed Critical Provtagaren AB
Publication of EP3380731A1 publication Critical patent/EP3380731A1/fr
Publication of EP3380731A4 publication Critical patent/EP3380731A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • F04B1/0536—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders with two or more serially arranged radial piston-cylinder units
    • F04B1/0538—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders with two or more serially arranged radial piston-cylinder units located side-by-side
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/06—Control
    • F04B1/07—Control by varying the relative eccentricity between two members, e.g. a cam and a drive shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/053—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with an actuating element at the inner ends of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/053—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with an actuating element at the inner ends of the cylinders
    • F04B27/0536—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with an actuating element at the inner ends of the cylinders with two or more series radial piston-cylinder units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0081—Special features systems, control, safety measures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/025—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms two or more plate-like pumping members in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/047—Pumps having electric drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
    • F04B49/123—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element
    • F04B49/125—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members by changing the eccentricity of one element relative to another element by changing the eccentricity of the actuation means, e.g. cams or cranks, relative to the driving means, e.g. driving shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
    • F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
    • F04B9/045—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being eccentrics

Definitions

  • the present invention relates generally to membrane fluid pump. More particularly, the present invention relates to a membrane pump as defined in the introductory parts of claims 1 .
  • the air flow rate through the samplers is important for the
  • membrane pumps are often used. Different sampler types, however, often require different flow rates. For the membrane pump to function with different sampler types the pump will thus need to operate with different speed.
  • a normal membrane pump has two membranes, each membrane being driven by a separate connecting rod.
  • the connecting rods for the two membranes are often driven by a common drive shaft with a cam
  • the two connecting rods are often connected to a single eccentric resulting in heavy vibrations in the pump.
  • All membranes are driven by pistons connected to a common drive shaft with a cam profile controlling the phase of the membranes.
  • Each level with four membranes are driven by the drive shaft to pump during with two membranes at a time 90 degrees phase shifted.
  • the cam shape of the drive shaft is made so that each opposing pistons will be in their outer and inner positions, respectively, at the same time, thereby balancing/neutralizing the mass movements of the pistons.
  • the lower level is an exact copy of the upper level.
  • a drawback with the configuration of CN210326534Y is that only two pulses per revelation of the drive shaft is achieved by the eight membranes and eight pump chambers. The two pulses are further produced during the first 180 degrees of a piston revolution. A vibration free movement is thus achieved on the expense of a very uneven flow.
  • the cam shape of the drive shaft and will also inflict a very uneven load for the pump engine reducing energy efficiency of the pump.
  • the pistons in CN210326534Y are further fastened in the drive shaft by rigid ring bearings, producing a movement where the piston angle is changed radically during each piston reciprocation.
  • a membrane fluid pump comprising a drive shaft rotatable within said fluid pump.
  • the shaft is equipped with a number of eccentrics distributed axially along the shaft.
  • the membrane fluid pump further comprises a set of connecting rods being connected to each of the eccentrics, wherein each connecting rod is attached between one of the eccentrics on the shaft and a membrane, so that each of the connecting rods is arranged to transfer a rotating movement of the shaft to a reciprocating movement pattern of each of the membranes.
  • Each connecting rod and corresponding membrane operates in an individual pump chamber.
  • Each of the eccentrics and the connecting rods are arranged in such a manner that all of the membranes will reciprocate with a phase shift evenly distributed over a 360 degree rotation of the drive shaft, and all of the eccentrics are rotationally offset to each other with an angle so that they are evenly distributed over a 360 degree rotation of the drive shaft.
  • the membrane fluid pump will due to the large number of membranes have a redundancy. If one membrane fails, others will still work as long as the membrane valve is closed.
  • each eccentric may have three connecting rods attached, each connected to one membrane.
  • the membrane pump may be driven by a three phase electrical motor simplifying acquisition of a motor for driving the pump.
  • This motor may be equipped with a rotary encoder, such as a set of Hall sensors in order to measure and control motor speed. It is further an advantage to enable to use standardized electrical motors if the motor has to be replaced, making it easier and cheaper to find a new motor.
  • the shaft of the membrane fluid pump may be equipped with two eccentrics, wherein each of the two eccentrics is connected to a set of three connecting rods.
  • each of the two eccentrics is connected to a set of three connecting rods.
  • the shaft may be equipped with more than two eccentrics, and the number of connecting rods connected to each eccentric is one more than the number of eccentrics.
  • the shaft may be equipped with more than two eccentrics, and the number of connecting rods connected to each eccentric is one less than the number of the eccentrics.
  • the membrane fluid pump according to the present invention may however in other embodiments comprise each eccentric to have more than three connecting rods attached.
  • connecting rods having e.g. five connecting rods and five 5 membranes.
  • the advantage with having a greater number of connecting rods and membranes is further that the flow rate will be smoother as the cycles of each connecting rod and membrane will have a smaller phase shift to the next connecting rod and membrane.
  • the connecting rods With five connecting rods connected to an eccentric, the connecting rods will have a phase shift of only 72 degrees compared to 120 degrees when having three connecting rods connected to an eccentric.
  • each eccentric is arranged to reciprocate from the same axial position along the drive shaft.
  • Each of the sets of connecting rods may e.g. be fastened to a ball bearing enveloping the eccentric of the drive shaft so as to create a crank effect. If the connecting rods are evenly distributed around the circular ball bearing, the phase shift between neighbouring connecting rods will be 360 degrees divided by the number of connecting rods.
  • the membrane fluid pump comprises a drive shaft rotatable within the fluid pump, a number of sets of connecting rods attached to the drive shaft so as to reciprocate with a phase shift evenly distributed over a 360 degree rotation of the drive shaft, wherein each connecting rod is arranged to drive a separate membrane.
  • the number of sets of connecting rods is equal to the number of connecting rods in each set, and each set of connecting rods are driven out of phase in relation to each other with 360 degrees divided by the number of sets of connecting rods. The number is greater than two.
  • each connecting rods will operate in phase with one connecting rod in each connecting rod set, where the connecting rods that operate in phase will have a phase shift evenly distributed over 360 degrees. In that way the centre of mass in the radial direct will stay unaffected by the crank movements leading to a vibration free operation of the membrane fluid pump.
  • the membrane fluid pump of the invention may further comprise an inlet valve and an outlet valve for each membrane.
  • the inlet valve and outlet valve are opening and closing by the difference in fluid pressure the said membrane exerts when moving in a reciprocating pattern. If several membrane inlets and outlets are connected in a manner so that the fluid pressure change from each of said reciprocating membrane contributes to the opening and closing mechanism of said inlet and outlet valves.
  • Prior art membrane pumps may have pressure difference driven inlet and outlet valves which are in an undefined state when no pressure difference is present. A certain pressure difference threshold is required to put those valves in either open or closed state, therefore a certain membrane reciprocating speed is required before such a pump will operate properly. A pump with normally closed valves will be able to operate at much lower membrane reciprocating speed enabling lower flow rates.
  • the shaft of several pump modules are connected in series, increasing the number of total membranes, thereby either further increasing total flow and reducing the pulsation if the membranes are evenly phase shifted among the modules or connecting several membranes in series, achieving a several stage vacuum pump or compressor.
  • the shaft may further be equipped with a gearbox to control the speed of the shaft and to reduce the rotational speed range of the motor driving the shaft.
  • the flow rate of the membrane fluid pump may further be controlled by enabling and disabling the opening and the closing of valves of separate membranes.
  • a control unit connected to the pump controlling the valves will thereby be able to effectively control the flow of the membrane fluid pump.
  • the flow rate of the membrane fluid pump may further be controlled by changing the offset of the eccentrics thereby changing the displacement volume of each membrane stroke. If a membrane is broken, the phase shift between the remaining membranes may be controlled so that the strokes of the remaining membranes are evenly distributed over a rotation and thereby produces a pulse-free flow.
  • the change may either be semi-permanently made when assembling the pump at the manufacturing stage or the eccentrics may be arranged to be controlled so as to change the
  • the displacement volume by e.g. changing the angle that the connecting rod is attached to the eccentric.
  • the flow rate of the membrane fluid pump may further be controlled by changing the dead volume of the membrane cavity.
  • the inlets and/or outlets from all membranes of the membrane fluid pump are interconnected via a cavity, so as to reduce interference between pump heads.
  • a pump head comprises a reciprocating membrane connected to a cavity further connected to an inlet valve and an outlet valve, where said membrane inflates said cavity while said inlet valve is open and deflates said cavity while said outlet valve is open.
  • Fig. 1 is schematic view of the cross section of one of the sets of connecting rods of a membrane fluid pump according to the present invention.
  • Fig. 2 is schematic view of a cross section along the drive shaft of the membrane fluid pump of the present invention showing the principle of the invention.
  • Fig. 3 is perspective view showing two neighbouring connecting rods in the direction of the drive shaft.
  • the two visible connecting rods belong to two different connecting rod sets.
  • Fig. 4a is a representation of the pulsation of the output flow from a pump according to the prior art.
  • Fig. 4b is a representation of the pulsation of the output flow from the pump according to Fig. 2 and Fig. 3.
  • Fig. 5 is table showing different possible configurations for an optimized multi membrane pump according to the invention.
  • Fig. 1 is schematic view of the cross section of one of the sets of connecting rods 3, 4 of a membrane fluid pump 1 according to the invention.
  • the connecting rods 3, 4 reciprocate with a phase shift evenly distributed over a 360 degree rotation of the drive shaft 2.
  • the individual connecting rods 3, 4 with their respective membranes 3", 4" will be phase shifted 120 degrees apart from each other.
  • Each connecting rod 3, 4, of the set of connecting rods 3, 4 is arranged to drive a separate membrane 3", 4".
  • the connecting rods 3, 4 of the set of connecting rods 3, 4 are fastened to an eccentric 7 offset to drive shaft 2.
  • the connecting rods 3, 4 are evenly distributed around the
  • Fig. 2 shows the membrane pump 1 of the present invention in a cross section along the drive shaft 2 showing the principle of the invention with having two connecting rod sets 3, 4 arranged to actuate their respective membranes 3", 4" in counter phase to each other, i.e. with a phase shift of 180 degrees.
  • the drive shaft is connected to a motor 8 for driving the pump.
  • the neighbouring connecting rod 4 in the direction of the drive shaft 2 is in its lower end position thereby eliminating any the combined mass movement in the radial direction to the drive shaft 2.
  • the connecting rods 3, 4 of each of the first set of connecting rods 3 and the second set of connecting rods 4 are arranged to reciprocate from the same position along the length of said drive shaft but phase shifted 180 degrees to eliminate any average mass movement in the radial direction of the drive shaft.
  • Fig. 2 further shows the motor 2 driving the membrane fluid pump.
  • the skilled person realizes from the claims and the summary of the invention that the embodiment of Fig. 2 could be extended with further sets of connecting rods. Any number of sets of connecting rods attached to the drive shaft may be arranged to reciprocate with a phase shift evenly distributed over a 360 degree rotation of the drive shaft.
  • Each connecting rod is arranged to drive a separate membrane, and the number of sets of connecting rods is then chosen to be equal to the number of connecting rods in each set of connecting rods. If the different sets of connecting rods are driven out of phase in relation to each other with 360 degrees divided by said number of sets of connecting rods the average mass movement in the direction of the drive shaft will be eliminated.
  • Fig. 3 is perspective view showing two neighbouring connecting rods 3, 4in the direction of the drive shaft 2 of the fluid membrane pump 1 .
  • the two visible connecting rods belong to two different connecting rod sets attached to two different eccentrics 7.
  • the membranes (not shown) are placed over the holes 5, 6 and are driven by the connecting rods 3, 4 in counter phase to each other to eliminate any average mass movement in the radial direction to the drive shaft.
  • Fig. 3 reveals a further advantage of the present invention. All chambers angled in the same direction, in the configuration of Fig. 2 and Fig. 3 two of the six chambers, may be serviced by removing one single "cylinder head" or lid.
  • Fig. 4a shows a representation of the pulsation of the output flow from a pump according to the prior art.
  • the solid lines show the pulses induced by the eight membranes of CN210326534Y, while the dashed line represent the combined average flow.
  • Fig. 4b shows the pulsation of the output flow from the pump according to Fig. 2 and Fig. 3. As can be seen the pulsation is much smother from the pump according to the present application than from the prior art pump. The reason for this is that the membranes of
  • CN210326534Y only pump at 90 and 180 degrees, leaving half a revolution of the crank shaft without any induction of pulses by the membranes.
  • Fig. 5 shows different possible embodiments of the pump according to the present invention.
  • the possible embodiments are marked in the table with a box and grey background. All the combinations of the table would produce a functioning pump, but only the combinations marked with a box and grey background achieve all advantages of the invention, i.e. a pulsation free pump where the reciprocation of the pistons and membranes are neutralized so that no net mass movement is present during rotation. In other words, the centre of mass is always kept along the centre axis of the drive shaft 2 during operation of the pump.
  • Fig. 5 shows that this configuration is possible with

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe à fluide à membrane (1) comprenant un arbre d'entraînement (2) pouvant tourner à l'intérieur de la pompe à fluide à membrane. L'arbre est équipé d'une pluralité d'excentriques (7) agencés axialement le long de l'arbre (2). La pompe à fluide à membrane comprend en outre un ensemble de tiges de liaison (3, 4) reliées à chacun des excentriques (7), chaque tige de liaison (3, 4) étant attachée entre l'un des excentriques (7) sur l'arbre (7) et une membrane (3'', 4''), de telle sorte que chacune des tiges de liaison (3, 4) soit agencée de manière à transférer un mouvement de rotation de l'arbre (2) à un schéma de mouvement alternatif de chacune des membranes (3'', 4''). Chacun des excentriques (7) et des tiges de liaison (3, 4) sont agencés de telle sorte que toutes les membranes (3'', 4'') soient animées d'un mouvement alternatif avec un déphasage réparti uniformément sur une rotation de 360° de l'arbre d'entraînement (2), et tous les excentriques (7) étant décalés en rotation les uns par rapport aux autres suivant un certain angle de telle sorte qu'ils soient répartis uniformément sur une rotation de 360° de l'arbre d'entraînement (2).
EP16855854.2A 2015-10-15 2016-10-17 Pompe à fluide à membrane Withdrawn EP3380731A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE1551338 2015-10-15
PCT/SE2016/051002 WO2017065685A1 (fr) 2015-10-15 2016-10-17 Pompe à fluide à membrane

Publications (2)

Publication Number Publication Date
EP3380731A1 true EP3380731A1 (fr) 2018-10-03
EP3380731A4 EP3380731A4 (fr) 2019-06-19

Family

ID=58517556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16855854.2A Withdrawn EP3380731A4 (fr) 2015-10-15 2016-10-17 Pompe à fluide à membrane

Country Status (3)

Country Link
US (1) US20180306170A1 (fr)
EP (1) EP3380731A4 (fr)
WO (1) WO2017065685A1 (fr)

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
CN112696341A (zh) * 2020-12-21 2021-04-23 深圳安吉尔饮水产业集团有限公司 隔膜增压泵的泵头、隔膜增压泵、水处理装置
CN112696342B (zh) * 2020-12-21 2024-02-20 深圳安吉尔饮水产业集团有限公司 隔膜增压泵的泵头的工作方法
US11767840B2 (en) 2021-01-25 2023-09-26 Ingersoll-Rand Industrial U.S. Diaphragm pump
CN113931828B (zh) * 2021-10-21 2023-06-23 气味王国(山东)科技有限公司 一种气腔压缩体积可调的气味涡圈高频喷射器动力装置

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US2364111A (en) * 1942-03-20 1944-12-05 John W Tucker Pump and the like
DE1428007A1 (de) * 1963-07-06 1968-12-05 Erich Becker Membran-Pumpe
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US20180306170A1 (en) 2018-10-25
WO2017065685A1 (fr) 2017-04-20

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